Merge pull request #1886 from andrew-s28/multiple-files-bugfix #621

Job	Run time
py3.13 \| macos \| unit tests	8m 4s
py3.13 \| macos \| integration tests	14m 41s
mypy	3m 32s
py3.13 \| ubuntu \| unit tests	13m 57s
py3.13 \| ubuntu \| integration tests	17m 50s
py3.13 \| windows \| unit tests	19m 9s
py3.13 \| windows \| integration tests	40m 59s
py3.10 \| ubuntu \| unit tests	13m 56s
py3.10 \| ubuntu \| integration tests	26m 30s
py3.11 \| ubuntu \| unit tests	13m 14s
py3.12 \| ubuntu \| unit tests	14m 28s
merge-test-artifacts	3s
	3h 6m 23s

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